function name
function resize_png_image($img,$newWidth,$newHeight,$target){
$srcImage=@imagecreatefrompng($img);
if($srcImage==''){
return FALSE;
}
$srcWidth=imagesx($srcImage);
$srcHeight=imagesy($srcImage);
$percentage=(double)$newWidth/$srcWidth;
$destHeight=round($srcHeight*$percentage)+1;
$destWidth=round($srcWidth*$percentage)+1;
if($destHeight > $newHeight){
// if the width produces a height bigger than we want, calculate based on height
$percentage=(double)$newHeight/$srcHeight;
$destHeight=round($srcHeight*$percentage)+1;
$destWidth=round($srcWidth*$percentage)+1;
}
$destImage=imagecreatetruecolor($destWidth-1,$destHeight-1);
if(!@imagealphablending($destImage,FALSE)){
return FALSE;
}
if(!imagesavealpha($destImage,TRUE)){
return FALSE;
}
if(!imagecopyresampled($destImage,$srcImage,0,0,0,0,$destWidth,$destHeight,$srcWidth,$srcHeight)){
return FALSE;
}
if(!imagepng($destImage,$target)){
return FALSE;
}
imagedestroy($destImage);
imagedestroy($srcImage);
return TRUE;
}
function addWaterMark($imageFile,$pagevalue){
// ob_start();
//echo "$imageFile==========>$pagevalue";
//exit;
chmod($imageFile,0777);
$disp_width_max=100; // used when displaying watermark choices
$disp_height_max=39; // used when displaying watermark choices
$edgePadding=15; // used when placing the watermark near an edge
$quality=100;
if($pagevalue==1)
{
//product thumb // used when generating the final image
$default_watermark=SITE_FS_PATH.'/watermark/water-mark1.png'; // the default image to use if no watermark was chosen
}
if($pagevalue==2)
{
///product big
$default_watermark=SITE_FS_PATH.'/watermark/water-mark2.png';
}
if($pagevalue==3)
{
$default_watermark=SITE_FS_PATH.'/watermark/water-mark3.png';
}
// an image has been posted, let's get to the nitty-gritty
if(file_exists($imageFile)){
// be sure that the other options we need have some kind of value
if(!isset($_POST['save_as'])) $_POST['save_as']='jpeg';
if(!isset($_POST['v_position'])) $_POST['v_position']='bottom';
if(!isset($_POST['h_position'])) $_POST['h_position']='right';
if(!isset($_POST['wm_size'])) $_POST['wm_size']='1';
if(!isset($_POST['watermark'])) $_POST['']=$default_watermark;
// file upload success
$size=getimagesize($imageFile);
if($size[2]==2 || $size[2]==3){
// it was a JPEG or PNG image, so we're OK so far
$original=$imageFile;
$target_name=basename($imageFile);
//$target=SITE_FS_PATH.'/uploaded_files/product_images/'.$target_name;
$target=$imageFile;
$watermark=$default_watermark;
$wmTarget=$watermark.'.tmp';
$origInfo = getimagesize($original);
$origWidth = $origInfo[0];
$origHeight = $origInfo[1];
$waterMarkInfo = getimagesize($watermark);
$waterMarkWidth = $waterMarkInfo[0];
$waterMarkHeight = $waterMarkInfo[1];
// watermark sizing info
if($_POST['wm_size']=='larger'){
$placementX=0;
$placementY=0;
$_POST['h_position']='right';
$_POST['v_position']='bottom';
$waterMarkDestWidth=$waterMarkWidth;
$waterMarkDestHeight=$waterMarkHeight;
// both of the watermark dimensions need to be 5% more than the original image...
// adjust width first.
if($waterMarkWidth > $origWidth*1.05 && $waterMarkHeight > $origHeight*1.05){
// both are already larger than the original by at least 5%...
// we need to make the watermark *smaller* for this one.
// where is the largest difference?
$wdiff=$waterMarkDestWidth - $origWidth;
$hdiff=$waterMarkDestHeight - $origHeight;
if($wdiff > $hdiff){
// the width has the largest difference - get percentage
$sizer=($wdiff/$waterMarkDestWidth)-0.05;
}else{
$sizer=($hdiff/$waterMarkDestHeight)-0.05;
}
$waterMarkDestWidth-=$waterMarkDestWidth * $sizer;
$waterMarkDestHeight-=$waterMarkDestHeight * $sizer;
}else{
// the watermark will need to be enlarged for this one
// where is the largest difference?
$wdiff=$origWidth - $waterMarkDestWidth;
$hdiff=$origHeight - $waterMarkDestHeight;
if($wdiff > $hdiff){
// the width has the largest difference - get percentage
$sizer=($wdiff/$waterMarkDestWidth)+0.05;
}else{
$sizer=($hdiff/$waterMarkDestHeight)+0.05;
}
$waterMarkDestWidth+=$waterMarkDestWidth * $sizer;
$waterMarkDestHeight+=$waterMarkDestHeight * $sizer;
}
}else{
$waterMarkDestWidth=round($origWidth * floatval($_POST['wm_size']));
$waterMarkDestHeight=round($origHeight * floatval($_POST['wm_size']));
if($_POST['wm_size']==1){
$waterMarkDestWidth-=2*$edgePadding;
$waterMarkDestHeight-=2*$edgePadding;
}
}
// OK, we have what size we want the watermark to be, time to scale the watermark image
resize_png_image($watermark,$waterMarkDestWidth,$waterMarkDestHeight,$wmTarget);
// get the size info for this watermark.
$wmInfo=getimagesize($wmTarget);
$waterMarkDestWidth=$wmInfo[0];
$waterMarkDestHeight=$wmInfo[1];
$differenceX = $origWidth - $waterMarkDestWidth;
$differenceY = $origHeight - $waterMarkDestHeight;
// where to place the watermark?
switch($_POST['h_position']){
// find the X coord for placement
case 'left':
$placementX = $edgePadding;
break;
case 'center':
$placementX = round($differenceX / 2);
break;
case 'right':
$placementX = $origWidth - $waterMarkDestWidth - $edgePadding;
break;
}
switch($_POST['v_position']){
// find the Y coord for placement
case 'top':
$placementY = $edgePadding;
break;
case 'center':
$placementY = round($differenceY / 2);
break;
case 'bottom':
$placementY = $origHeight - $waterMarkDestHeight - $edgePadding;
break;
}
if($size[2]==3)
$resultImage = @imagecreatefrompng($original);
elseif($size[2]==1)
$resultImage = imagecreatefromgif($original);
else
$resultImage = imagecreatefromjpeg($original);
@imagealphablending($resultImage, TRUE);
$finalWaterMarkImage = @imagecreatefrompng($wmTarget);
$finalWaterMarkWidth = imagesx($finalWaterMarkImage);
$finalWaterMarkHeight = imagesy($finalWaterMarkImage);
imagecopy($resultImage,
$finalWaterMarkImage,
$placementX,
$placementY,
0,
0,
$finalWaterMarkWidth,
$finalWaterMarkHeight
);
if($size[2]==3){
@imagealphablending($resultImage,FALSE);
imagesavealpha($resultImage,TRUE);
@imagepng($resultImage,$target,$quality);
}elseif($size[2]==1){
imagegif($resultImage,$target,$quality);
}else{
imagejpeg($resultImage,$target,$quality);
}
imagedestroy($resultImage);
imagedestroy($finalWaterMarkImage);
// display resulting image for download
}
}
}
use in page
$thumb_imaget=upload_file($img_namet,"imageth","uploaded_files/product_images");
addWaterMark(SITE_DIR_PATH."/uploaded_files/product_images/".$thumb_imaget,3);
http://www.experts-exchange.com/Programming/Languages/Scripting/PHP/Q_28460602.html
zip file extract
http://electrofriends.com/qna/software-languages/php-faq/extract-unzip-files-zip-file-php/
